Departing from the debate about the influence of religiosity in general, and Islamic religiosity in particular, on gender role values, this contribution examines the association between religiosity and gender role values among men and women of the Turkish and Moroccan second generation in Belgium. Firstly, a theoretical model of Islamic religiosity was derived, consisting of religious identification, (partly gender specific) religious practices and orthodox beliefs. Subsequently, equivalence of this theoretical model across genders and across two ethnic groups was tested drawing on survey data from the Belgian TIES-project (The Integration of the European Second generation). In a second step, the association between Islamic religiosity and gender role values was analysed and again it was examined whether there are gender and ethnic differences in this association. Taking a host of control variables into account (age, education, employment status, marital status and religious socialisation), the analysis revealed no significant ethnic differences. More importantly, only weak negative correlations between Islamic religiosity and more egalitarian gender values were found; moreover, this association was somewhat stronger for men than for women. These results contradict the hypothesis that higher levels of Islamic religiosity necessarily go together with more traditional and less egalitarian gender role values. Further, they highlight the importance of taking gender differences into account when analysing religiosity among Muslim minorities in Europe.